So... I got a number of automotive style voltmeters from the FleaBay, for a project.
I intended to rescale them to 5V FSD so i can drive them with PWM from a microcontroller, but upon opening one I find a mechanism that i've never seen before.
I don;t know what to search on to find out more - can anyone suggest the name/type to look up? There's also no scaling resistor(s) on the small PCB, so if the number or ratio of turns on the coils is what scales it, I'm just going to buy some more conventional ones!
Interestingly the movement is very damped.
I intended to rescale them to 5V FSD so i can drive them with PWM from a microcontroller, but upon opening one I find a mechanism that i've never seen before.
I don;t know what to search on to find out more - can anyone suggest the name/type to look up? There's also no scaling resistor(s) on the small PCB, so if the number or ratio of turns on the coils is what scales it, I'm just going to buy some more conventional ones!
Interestingly the movement is very damped.